1、Fitment: The reroute kit is a replacement for Silverado 2500 HD 3500 HD6.6 Diesel LML Duramax, for Sierra 2500 HD 3500 HD6.6 Diesel LML Duramax. 2、Unique Design: Adopts venturi style design, no need for restrictive baffles; no oil loss, no need to worry about puddles under your truck; streamline routing with no angles, provides better pressure flow. 3、Advantage: Vents crankcase blow by decreasing oil deposits in the engine, eliminates the need for the crankcase box on the top of the engine, frees up room for more activities under the hood. 4、Package Includes: The reroute fitting kit includes 4pcs resonant plug, 4pcs seal ring, 2pcs pipe hoop, one tee tube, and one tubing, which is complete and has stable performance. 5、Material: Made of metal and rubber material. These lines do not deteriorate or swell over time due to use and holds up a lot stronger to heat and extreme circumstances. Item Type: Reroute Kit Material: Rubber, metal Fitment: Fits for Silverado 2500 HD 6.6 Diesel LML Duramax 2004-2010 Fits for Silverado 3500 HD 6.6 Diesel LML Duramax 2004-2010 Fits for Sierra 2500 HD 6.6 Diesel LML Duramax 2004-2010 Fits for Sierra 3500 HD 6.6 Diesel LML Duramax 2004-2010 4 x Resonant Plug 4 x Seal Ring 2 x Pipe Hole 1 x Tee Tube 1 x Tubing